When fasting I eat one meal a day and occasionally a snack if i am desperate for food. When you eat the one meal would it be a violation of the fast. Today my mom made this great dessert she never made before I wanted to eat but I was not sure so I did not eat it.
(FYI my family is not Catholic I’m just one of those kids/teenagers waiting to convert)
My dear friend in Christ,
You ask such wonderful and thoughtful question.:clapping: :tiphat:
Go ahead and eat it if that is what you want to do, no sin involved.
We are speaking here not only of a matter of “Church practice,” but one step lower, our choice of how we are going to perform this paractice. (This is one of those rare opportunites where we are permitted to decide for ourselves

).
The only parts of the Moral Obligation that can’t be changed are who is obligated: “all healthy Catholics age 14+ to 1 st. day of age 60.” And abstainence from meet on all Friday’s in Lent.
Additionally
Ash Wed. and Good Friday, are day’s of "complete fast; meaning not only no meat, but only on full meal.
What ever additional pious acts we perfrom, partial fasting, additional good works, or spiritual works, factor in our persoanl relationship with God, and what we desire to offter, purely out of Love for God.
In your example you could have (your persoanl option) eaten mom’s desert, and substituted something else or nothing else, unless it was Ash Wednesday or Good Friday, then, you could, but what you did was better
Love and prayers,